Answer:
Because heat is lost from the surface of the body, small mammals lose a greater proportion of their body heat than large mammals. Mammals conserve body heat with their hair or fur. It traps a layer of warm air next to the skin. ... Mammals also have a layer of fat under the skin to help insulate the body.
Answer:
The correct answer is: C) Receptor-mediated endocytosis.
Explanation:
- Receptor-mediated endocytosis can be defined as the process in which when certain molecules or substances (lipoproteins) bind to their cognate receptors present on the surface of the cells, they are internalised into the cells by the inward protrusion of the plasma membrane into the cell followed by the pinching off of the membrane in the form of a vesicle.
- The vesicle contains the lipoproteins bound to the receptors.
- The lipoproteins are then targeted to the endosomes for recycling or other purposes.
- The endocytosis process is mediated by specific structural proteins called the clathrin which line the inner plasma membrane beneath the lipoprotein receptors.
- They help the plasma membrane to protrude into the cells and pinch off in the form of a vesicle.